14. In man, hemophilia (failure of blood to clot) is a recessive
and sex-linked character. A man and a woman, both normal in respect
to blood-clotting, have (a) a hemophilic son who has a daughter who
is normal, (b) a daughter who has normal blood and who has one
hemophilic and one normal son, and (c) another daughter with normal
blood who has five sons, all normal. What are the probable
genotypes of grandparents, children, and grandchildren?

15. In the fruit fly, red eye is dominant to white eye, which is
sex-linked. Specify the distribution of eye color (a) among the
males and (b) among the females, derived from each of the following
crosses: a. white-eyed female x red-eyed male b. heterozygous
red-eyed female x white-eyed male c. heterozygous red-eyed female x
red-eyed male